The upcoming episode, which was scheduled to air Tuesday, April 27, will see the Winchester brothers, Sam and Dean, setting aside the Amara problem and traveling to a place in Colorado to fight monsters.

When "Supernatural" Season 12 returns, Dean (Jensen Ackles) and Sam Winchester (Jared Padalecki) will face off a whole lot of Big Bads. Castiel (Misha Collins) is also going to come back with a vengeance.
Season 11 left with Mary Wi...